Sand-drier.



. N0. 7I|,328. Patented Oct. [4. I902. G. & H. MERRIMAN.

SAND DRIER.

(Application filed June 25, 1902.; (No Model.) 2 She ts-Sheet I.

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Patented Oct. I4, I902. G. &. H. MEBRIMAN.

S A N D D R l E B.

(Application filed June 25, 1902.)

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-(No Model.)

WITIVESSES:

INVENTORS .j s r-n'vnanl mus wrm s co. PuqTaL UNlTED STATES PATENT OFFICE.

GEORGE MERRIMAN AND HERMAN MERRIMAN, OF TOLEDO, OHIO, ASSIGN- ORS TO THE TOLEDO ASPHALT PATCHER COMPANY, A CORPORATION OF NEW JERSEY.

SAND-DRIER.

SPECIFICATION formingpart of Letters Patent No. 711,328, dated October 14, 1902. Application filed June 25,1902. SerialNo. 113,121- (No model.)

To (all whom it nu/q concern.-

Be it. known that we, GEORGE MERRIMAN and HERMAN lVlERRIMAN,citizens of theUnited States, residing. at Toledo, in the county of Lucas and State of Ohio, have invented certain new and useful Improvements in Sand- Driers, of which the following is a specification.

Our invention relates to sand-driers, and

especially such as are adapted for use in connection with portable asphalt-paving plants, the object being the production of an improved drier which shall be simple in construction, comparatively cheap in first cost,

easily operated, eflicient in operation, and

which withal shall constitute a superior instrumentality for performing the requisite functions.

Our invention consists in certain novelties of construction and combinations of parts hereinafter set forth andclaimed.

The accompanying drawings illustrate an example of the physical embodiment of our invention constructed according to the best mode we have so far devised for the practical application of the principle.

Figure 1 is a view of a portable asphalt plant entire, showing the drier in its relative position to the other parts. Fig. 2 is a side 0 view of the drier complete. Fig. 3 is a lefthand end view of Fig. 2 in elevation. Fig. 4 is a right-hand end view of Fig. 2 in elevation. Fig. 5 is a longitudinal section of Fig. 2 through the centerline. Fig. (i is a crosssection of Fig. 2on line 1 1. Fig. 7is a crosssection of Fig. 2 on line 2 2.

The numeral 1 designates a boiler; 2, a steam-engine; 3, a longitudinal shaft; 4, a link belt uniting the engine and shaft; 5, a

40 gear-wheel on the shaft;'6, a mixer; 7, a sand.-

elevator, and 8 represents gear-wheels on the end of shaft 3 for transmitting motion to the sand-elevator and mixer.

The letter A designates the metallic side walls of the drier; B, fire-brick lining at the bottom and sides of the furnace; C, a metallic arched roof; D, a bridge-wall of fire-brick; E, the revolving drum or cylinder; F, a flange on the inside of the drum and extending from end to end thereof.

G designates angle-iron agitators joining the metallic strips on the inside of the drum, which constitute the worm.

ll is the front spider, of the form shown with bent legs, to which is secured the bearing-shaft; l, the rear spider, to which the rear bearing-shaft is secured; J, a draft-flue; K, an induction draft-fan; L, an engine to operate the fan; M, a flue to which the fan delivers the products of combustion, said line opening to the atmosphere.

N designates the gratebars of the furnace.

O is the hot-sand chute; P, the wet-sand chute, having its end located within the space formed by the bent legs of the spider; Q, a gate in connection with the chute; R, a spurgear. p i

S designates the housings for the shafts; T, the roller-bearings; U, the fire-doors.

V is a door for cleaning out the end of the furnace back of the arch; W, the framework on which the drier is mounted, said framework in this example consisting of two channel-beams supportedby wheels and axles.

X designates web braces and supports for the fan-box, and Y is the open space for oil in the bearings.

In use the sand-drier is designed to drive off the moisture from sand, which varies in quality accordingto the locality from which it is secured. It may be dry-bank or drippingwet river-sand, and to accomplish this a temperature of approximately 360 Fahrenheit is required. The wet or moist sand is introduced into the drum through chute P and thrown inwardly clear of the forward end of the drum when delivered by reason of the nose of the chute P being located in the annular space formed by the bent arms of the spider H. The drum rotates in the direction of the arrow shown in Fig. 6, the angle-irons G serving to lift the sand and turn and agitate and sprinkle the same as the drum rotates. These irons carry the sand partly up the side of the drum to a position where it falls under the action of gravity downwardly in a shower, mingling freely with thehotgases passing through the drum from the furnace to the exit-flue. The flange F works the sand toward the rear of the drum, where it passes by gravity between'the arms of the spider I and falls in a shower to the'ohute 0. While falling it a second time comes in thorough contact with the ascending hot gases. An induced draft is preferably employed to force the hot gases from the furnace through the drum and flue J and then upwardly by Way of the stack or flue M to the air. On arising from the fire the gases first pass upwardly over the fire-wall or arch D to the rear combustion-chamber, where they meet the downpouring sand from the end of the drum. Then they pass up into the end of the drum, then through the length of the drum to its front end and into the draft-flue J, from whence they are delivered by the fan K to flue Maud the atmosphere. The fan is driven by a small steam-engine L, operated by steam from the boiler shown in Fig. 1. The shaft at the front end of the drum is provided with flanges to prevent the creeping of the shaft due to the expansion of the drum, thus keeping the drum tight against the framework of the furnace and preventing the sand from falling into the firebox. The close proximity of the end of the cylin'der or drum to the end of the furnace-walls also insures the passage of the gaseous products of combustion through the center of the cylinder. The rear bearing for the cylinder is arranged to permit expansion of the drum. The pinion which drives the spur-gear R is made with extra-wide face to permit the spurwheel R to travel longitudinally and not be thrown out of gear. The open spaces Y in the bearings are to be filled with oil to lubricate the rollers upon which the shafts turn.

As seen on reference to Fig. 1, the drum is 1'0- tated by the engine through the medium of the link belt 4, shaft 3, and gear 5, which latter unites the gear-wheels upon the ends of shaft 3 and the engine-shaft.

From the foregoing description, taken in connection with the drawings, it is obvious that We have produced a sand-drier especially adapted for use in connection with a portable paving plant and which fulfils all the conditions set forth as the end and object of our invention.

What we claim as new, and desire to secure by Letters Patent, is-- 1. The combination with the frame \V WV supported upon wheels and axles, of a drler mounted uponthe frameand comprising a furnace, a drum with open ends located within the furnace-walls and having spiders I, H and shafts, one of the shafts being provided with a gear-wheel R, a wet-sand chute P, a hot-sand chute O, a flueJ leading from the lower portion of the drum, a fan K, engine L for operating the fan, a flue M, an engine 2, shaft 3, sprocket-chain 4, and. gear-wheel 5; the said gear-wheel 5 meshing with the gear- Wheel R on the bearing-shaft of the drum, and the said drum being provided with a continuous flange F upon its interior surface for advancing the sand from end to end of the drum; all in substance as set forth.

2. The combination with the longitudinal frame W Wsupported upon wheels and axles, of a drier mounted upon the frame; said drier comprising the metallic side walls A with brick linings B, metallic arch-roof O, a revolving drum E with shafts and spiders at each end, endless flange F and agitators G on its interior surface, a chute P for the introduction of wet sand, a hot-sand chute O, a draft-flue J leading from thelower portion of the drum, a draft-fan K at the end of fine J, a flue M in communication with the fan, an engine L for operating the fan; and operating mechanism for the drum comprising an engine 2, a longitudinal shaft 3 mounted upon the frame W, a sprocket-chain 4 connecting the engine-shaft and shaft 3, a gearwheel 5 on shaft 3, and agear-wheel R upon a supporting-shaft of the drum; the arrangement being such that the drum is revolved by the shaft 3, and the products of combustion are drawn by the fan K from the furnace through the cylinder, where they come in contact with the wet sand, and are thence discharged to the atmosphere.

In testimony whereof we affix our signatures in presence of two witnesses.

GEORGE MERRIMAN. HERMAN MERRIMAN.

Witnesses:

W. J. ANSON, H. L. LASKEY. 

